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[seq2seq] document the caveat of leaky native amp #8930

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Dec 4, 2020
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[seq2seq] document the caveat of leaky native amp #8930

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document the caveat of leaky native amp
stas00 Dec 4, 2020
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Update examples/seq2seq/README.md
stas00 Dec 4, 2020
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Expand Up @@ -79,6 +79,11 @@ test.target
```
The `.source` files are the input, the `.target` files are the desired output.

### Potential issues

- native AMP (`--fp16` and no apex) may lead to a huge memory leak and require 10x gpu memory. This has been fixed in pytorch-nightly and the minimal official version to have this fix will be pytorch-1.8. Until then if you have to use amp please use NVIDIA's apex. Reference: https://github.com/huggingface/transformers/issues/8403
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